package utils

import (
	"crypto/rand"
	"encoding/hex"
	"fmt"
	"github.com/pdfcpu/pdfcpu/pkg/api"
)

func GenerateSessionId(length int) string {
	bytes := make([]byte, length) // 16 bytes = 128 bits
	_, err := rand.Read(bytes)
	if err != nil {
		panic("failed to generate session ID")
	}
	return hex.EncodeToString(bytes)
}

func GenerateToken() string {
	return GenerateSessionId(16)
}

func CountPagesAtPath(path string) (pages int) {
	ctx, err := api.ReadContextFile(path)
	if err != nil {
		fmt.Println("Error reading PDF:", err)
		return
	}

	pages = ctx.PageCount
	return
}